<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    body{
      height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .box{
      border: 50px solid;
      border-color: transparent transparent #12f325 #13cfeb;
      /* border-color: #f15811 transparent transparent transparent; */
      position: relative;
    }
    .box::after{
      content: '';
      position: absolute;
      border: 34px solid;
      border-color: transparent transparent #fff #fff;
      left: -40px;
      bottom: -40px;
    }

    .box2{
      border: 50px solid;
      border-color: transparent #c4ea1b transparent transparent;
      border-radius: 50%;
    }
  </style>
</head>
<body>
  <div class="box"></div>

  <div class="box2"></div>
</body>
</html>